The hacking collective, which has already denied any connection with alleged hacker Ryan Cleary, is promising more action for tomorrow (Friday).

Cleary, a 19 year old from Essex, has been charged with running denial of service attacks on Soca's website and sites linked to the British Phonographic Industry and International Federation of the Phonographic Industry.

The statement from ONS said: “I can reassure the public that their census records are secure. We have strict measures in place protecting the nation’s census information.

"The claim that hackers got in looks like a hoax and our investigation concluded that there is no sign of any suspicious activity. The alleged hackers have also denied any involvement.

“However, we are not complacent and will remain vigilant. The security and confidentiality of census data remain our top priority."

The technology for the census was provided by US defence contractor Lockheed Martin. ®